Sensitizing-medium-changing mechanism.



C. M. WILLIAMSON.

' SENSITIZING MEDIUM CHANGING MECHANISM.

APPLICATION FILED JULY 1.1918.

Patented Feb. 4, 1919.

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COLIN M. WILLIAMSON,

nan onnron OF LONDON, ENGLAND.

SENSITIZING-MEDIUM-CHANGING MECHANISM.

Specification of Letters Patent.

Patented Feb. 41, 1919.

Application filed. July 1, 1918. Serial No. 242,942.

. Patent Application Serial No. 208,971, filed the 26th December, 1917, in which interchangeable lockin means is provided to allow of the camera %eing operated either manually or by means of an airscrew.

In this camera a train of gearing operating the mechanism for changing the plates or other sensitized medium, is adapted to be connected with a train of gearing driven from an airscrew or to be disconnected from the airscrew train of gearin and manually operated by a handle. A loc ing pin is provided which can be used to-lock the handle to the connecting link between the trains or gearing or to release the handle and to look a member of the train of gearing driven from the airscrew to the camera casing.

Experience has proved that there is some I danger of losing the locking pin and the present invention is designed to provide mechanism in which there are no loose parts which can be removed and mislaid or lost.

My invention is illustrated by way of example in the accompanying drawlngs, in which Figure 1 shows a side view of the mechanism in the position in which the operating 7 a handle is linked to the train of gearing driven from the airscrew;

Fig. 2 shows the position of the link mechanism in which the handle is disconnected, and

Fig. 3shows an alternative form.

Referring now to the drawings :1 indicates the shaft driven from an airscrew through the medium of a flexible shaft con- I nected coupling member 1, 2 the worm mounted on said shaft and 3 the worm wheel driven from said worm adapted to rotate the movement of a pallet and consequently the movement of the shutter-operating trigger 1n the manner broadl set forth in the aforesaid application. This mutilated wheel 4: is connected by means of the link 6, with the handle 5 through which the train of gearing operatin the plate changing mechanism is actuate as disclosed in said companion application. The wheel a is provided with a crank pin 7 engaging in a slot 8 formed in the link 6. The pin 7 is 1101'- mally retained in a lateral extension of said slot 8 by means of a spring-controlled member suitably in the form of a pivoted plate 9 thereby linking the handle to the mutilated wheel 4 and providing for the plate changing mechanism being driven through said link from the airscrew.

When it is desired to disconnect the han- .dle 5 from the mutilated wheel at the link 6 is raised by means of the lifting member 10 to a position in which. the slot 8 in the link 6 is clear of the spring-controlled member 9 and the pin 7 is free to move in said slot 8 as shown in Fig. 2. In this position the airscrew is therefore disconnected and the camera can be operated through the handle 5 at the will of the operator. In order that the parts may be automatically returned to the normal position shown in Fig. 1, the lifting member 10 is controlled by a spiral spring 11 tending to return said member to the position shown in Fig. 1 when a stop 12 projecting from said member registers with a slot 14 in the cameracasing. The slot covering member 9 is controlled by a spring 13 tending to bringsaid cover over the slot 8 when the mechanism is in the position shown in Fig. 1.

In an alternative. form illustrated in Fig. 3, the pin 7, can .be held normally at the end of the slot 8 by a spring 16' actin on the extended lever end 15 of the ham le 5 so that the gearing will operate the link 6. Upon disconnecting. the s' ring 16 or otherwise freein the handle 5 nom the retractile action of t e spring, the pin 7 will move freely in the slot 8 without transmitting power to the link 6.

I have described in detail the particular construction illustrated in the accompanying drawings, but it will be evident to en ,edto connect saidtrains of gearing, a..,con-

necting member moved bysaid first train of gearing adapted to slide inthe' e165 in said k nd m an r hpldi e ai i ennectin ,member in a position insaid' link slot 'gm which said trains of gearingare connected. I 2.- b elie c me a. ,f ja re ia comprising a train of gearing, neans ,for driving said train of gearing, a second train of gearing operating plate changing mechanism, a handle adapted to drive s a'id second tra n of gearlng', a c ank, PHI, Incent- 19d on whe liea fir t, rainp ee iiigm slotted link adapted .to connect 'saidtlfiank 25.

pin with, the operating handlefi ,Said 5QQnd train of gearing and. means for} holding said crank pin in 'a ,position in. said, linki slotiin which 7 said trainsv of 4 gearing are ,c'pnn' to 3! A Ph tog aphi cam r adapted to drive i said ,tIQMI Z-Of gearing] a see ed train-Dis re s qpea n the {Plate ha e n lms ian sm, h dl ada ted t i' l a s w id train o (ge ing-I a 1 r e pin mounted on a 'vvheelliii'said, first ,train {of gearing, a slotted. ,link ,ada'pted vto connect isaid crank pinwithlthe operating-handle of saidrsecond train, of gearing, "a.,plate,,piv-

, oted to said, link, a spring mounted on ,1 said linktending to ,holdsaid pivoted platfl Ithelink slot andsaid crank pin a' later'al extension of ,the slot.

4L A ;photographic camera for. aircraft comprising a train of gearing,,an airscrew adapted to drive said train of gearing, asecend train of "gearing operating theplate changing mechanism, a handle adapted to drive said. second train "of gearing, a crank pin mountedon a wheelinsaidfirstfltrain of vgearing, a slotteddink adapted ,to connect said crank pin jvith the operating handle of said second train of gearing, a platepivoted to said link, aspri ngl 'mounted on said link tending to hold said pivoted ,pIateover the link slotand saidcrankpinin a lateral ex- 1 tension of ,the slot and meansrior lifting, said link to a,position .in relationtoihe'crank'pin that the cover plate ,is moved fr ir-the n S 0 an d r l l sg m to. me einlth slot. A he ca ar h swa m-f rcr f comprising a train of gearing, an airscrew adapt t d ve ,sa it n o ste ing ond train of gearing operating,the plate c a ging me anis a h d .edept da aw ra o pnsmg tram, of ge 'm ien ,al st drive said second train of gearing, a crank pin mounted on a Wheel in said first train of gearing, a slotted link adapted to connect sai'dfc'rank pin with the operating handle of said second train of gearing, a'plate pivoted to said link, a spring mounted on said link tending to hold' .I said pivoted plate over the link slot and said crank pin in a lateral ex- "ftensi'on o-fthe' slot, a lifting member adapted :to raise said link to a position in which the link slot is clear of the spring controlle'dpiv- ,oted plateand said crank pin is in a position free to move in "said slot, and a spring controlling said lifting member.

A photographiccamera for ,aircraft comprising a itr'a n" of gearing, an airscliew adapt t drive sa trai of g in 11 second train gearing operating the, plate changing mechanism, a handle 1 adapted to drive said second train of gear ng, a crank pin. mounted on a wheelinsaid first tra n, of

gearing, a slotted link adapted tof co-nnect saidcrank pin iththe,operatingl handle pf fsai'd trai nof gearing, a platefpivoted tofsaid link, aspring mounted on said ,link'tending f0 l lSl id P Y Wd, pl e W t lll l $19 and sai -1 Q ap' qp n eie l lfl xlfill i llfi the" slot, a spindle mountedfin gth'e; camera casing, an arni' on said spindle 'adapt'ed to aprdje tb ah.swa mea si wh ire find o a sp nd i or. ra si an. in rou a v f pin to a pes'iti in W1 1i the i $10? is cle r O the, p vote Blew and said crankpin is in a positionireeto move in saidslot and a spiral spring ,tending'lto hold said spindle in a pos tion n which thecrankpin s inrlpo s t onin the slot extension.

7., A photographic camera ,foriaircraftprisi g t a p s ems, a ,e s'cfe adapted to dr ve sa1dtria1n of gear ng, a second train of gearing operating the'pla'te drive i said second train of gearing, a pin mounted on a wheel in sa dfirst tram of gearing, aslotted link. adapted to connect said crankpinvvith the operating handle of said second train of gearing, a plate pivoted to said link, a spring mounted on said link tending to ,hold said pivoted plate eve; the

link slot and said crank pin in a lateral extension of the slot," a lifting member adapted to raisesaid linkto a position in which the link slot is clear'ofthe spring controlled pivoted plate and'the crank pin is free to move insaid slot, a springcontro i gsa l fiti s memb ran es er on said lifting member adapted to watt with s o mtheqame fi ae 8. A photognaplnic vcamera an aircraft,

comprisingla train of gearing,'fme ansfl for connecting said gearing 'Qvvith an 'ainscrew,

changing mechanism, a handle adaptedlto an operating ,niemberfconnected to an -,ele- I ment of the sensitized-medium changing mechanism, a slink connection between" member and said gearing, and means for rendering said link connection operative or inoperative at will.

9. A photographic camera for aircraft comprising a train of gearing, means for driving said train of gearing, a handle for operating the sensitized-medium changing mechanism, a slotted link adapted to connect said handle to said gearing, a connecting member actuated by said gearing and 10 adapted to slide in the slot in said link, and means for holding said member in position to connect said handle operatively to said gearing.

In testimony whereof I sign my name to 15 this specification.

C. M. WILLIAMSON.

Copies of this patent may be obtained for five cents each, by addresaing the Gommimfloner of Patents, Washington, D. fi. 

